diff --git a/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackendFactory.java b/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackendFactory.java
index 728393f..611ae9b 100644
--- a/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackendFactory.java
+++ b/src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackendFactory.java
@@ -69,6 +69,7 @@ public abstract class AccountingPersistenceBackendFactory {
 	}
 	
 	protected static FallbackPersistenceBackend createFallback(String scope){
+		logger.debug("Creating {} for scope {}", FallbackPersistenceBackend.class.getSimpleName(), scope);
 		File fallbackFile = null;
 		if(scope!=null){
 			ScopeBean bean = new ScopeBean(scope);
@@ -84,6 +85,8 @@ public abstract class AccountingPersistenceBackendFactory {
 	}
 	
 	protected static AccountingPersistenceBackend discoverAccountingPersistenceBackend(String scope){
+		logger.debug("Discovering {} for scope {}", 
+				AccountingPersistenceBackend.class.getSimpleName(), scope);
 		ServiceLoader<AccountingPersistenceBackend> serviceLoader = ServiceLoader.load(AccountingPersistenceBackend.class);
 		for (AccountingPersistenceBackend foundPersistence : serviceLoader) {
 			try {
@@ -111,7 +114,7 @@ public abstract class AccountingPersistenceBackendFactory {
 	protected static AccountingPersistenceBackend rediscoverAccountingPersistenceBackend(AccountingPersistenceBackend actual, String scope){
 		Long now = Calendar.getInstance().getTimeInMillis();
 		Long lastCheckTimestamp = fallbackLastCheck.get(scope);
-		logger.trace("Last check was {}", lastCheckTimestamp);
+		logger.debug("Last check for scope {} was {}", scope, lastCheckTimestamp);
 		
 		if( (lastCheckTimestamp + FALLBACK_RETRY_TIME) <= now ){
 			logger.debug("The {} for scope {} is {}. Is time to rediscover if there is another possibility.",
@@ -178,8 +181,10 @@ public abstract class AccountingPersistenceBackendFactory {
 		}
 		
 		AccountingPersistenceBackend persistence = null;
+		logger.debug("Going to synchronized block in getPersistenceBackend");
 		synchronized (accountingPersistenceBackends) {
 			persistence = accountingPersistenceBackends.get(scope);
+			logger.debug("{} {}", AccountingPersistenceBackend.class.getSimpleName(), persistence);
 			if(persistence==null){
 				/* 
 				 * Setting FallbackPersistence and unlocking.